Kolaches

1 cup sour cream
1/2 cup sugar
1 1/2 teaspoons salt
1/2 cup (1 stick) butter or margarine, melted (If you use unsalted butter or margarine, add an additional 1/4 teaspoon salt)
2 teaspoons instant yeast OR 1 packet active dry yeast
1/2 cup lukewarm water
2 large eggs
1 tsp orange or lemon zest(or a few drops of lemon extract)
4 cups All-Purpose Flour

PINEAPPLE FILLING 
20-ounce can crushed pineapple, drained*
1 cup sugar(This was quite sweet, you could probably easily get away with 3/4 cup)
2 tablespoons cornstarch OR Instant ClearJel
2 tablespoons melted butter

*If you’re using cornstarch as the thickener, reserve 3 tablespoons of the pineapple juice, in which you’ll dissolve the cornstarch.

STRAWBERRY FILLING
1.5 lbs. frozen strawberries
1 cup sugar(This was quite sweet, you could probably easily get away with 3/4 cup)
2 tablespoons cornstarch OR Instant ClearJel
2 tablespoons melted butter

*If you’re using cornstarch as the thickener, reserve 3 tablespoons of the strawberry juice, in which you’ll dissolve the cornstarch.

STREUSEL TOPPING
2/3 cup All-Purpose Flour
1 cup sugar 
1/3 cup (about 5 2/3 tablespoons) melted butter
(This is more than enough streusel for a double batch of dough)

DOUGH: Warm the sour cream gently, and combine it with the sugar, salt, and butter or margarine in a large mixing bowl, or the bowl of an electric mixer. Cool the mixture to lukewarm (if it isn’t already that temperature), and add the yeast (if you’re using active dry yeast, dissolve it in the water first), warm water, eggs, and flour. Mix and knead the dough, using your hands, or a mixer, until it’s soft and smooth. Transfer the dough to a lightly greased bowl, cover the bowl with plastic wrap, and refrigerate the dough overnight. Note: This dough won’t rise much, so don’t worry about having to put it in a huge bowl.

Next day, remove the dough from the fridge, and divide it into about 24 pieces, each 1 3/4 ounces, about the size of a golf ball. Place the pieces on lightly greased or parchment-lined baking sheets, leaving about an inch between them. Flatten the balls till they’re about 1/2-inch thick, and allow them to rest for 10 minutes.

PINEAPPLE FILLING: In a medium-sized saucepan, heat the drained pineapple to boiling. If you’re using Instant ClearJel(r), mix it with the sugar, and stir this mixture into the pineapple. Immediately remove the filling from the heat, and stir in the melted butter. Cool to lukewarm before using.

If you’re using cornstarch, mix it with the reserved pineapple juice. Stir the dissolved cornstarch and the sugar into the hot pineapple, and cook over medium heat, stirring, till the mixture thickens and becomes clear. Remove it from the heat, stir in the melted butter, and let it cool to lukewarm before using.

STRAWBERRY FILLING: In a medium-sized saucepan, heat the strawberries to boiling, drain off excess juice(I removed ~1 cup). If you’re using Instant ClearJel(r), mix it with the sugar, and stir this mixture into the strawberries. Immediately remove the filling from the heat, and stir in the melted butter. Cool to lukewarm before using.

If you’re using cornstarch, mix it with the reserved strawberry juice or water. Stir the dissolved cornstarch and the sugar into the hot berries, and cook over medium heat, stirring, till the mixture thickens and becomes clear. Remove it from the heat, stir in the melted butter, and let it cool to lukewarm before using.

STREUSEL TOPPING: In a small bowl, mix together the flour and sugar, then add the butter, stirring till crumbs form.

ASSEMBLY: Using your fingers, make a wide, deep indentation in the center of each flattened dough ball. Don’t be afraid of being decisive here; you want to make a deep enough indentation that it doesn’t just disappear as the buns rise and bake. Place about 1 heaping tablespoon of the filling into each bun; crumble a little of the streusel on top. Cover the kolaches, and allow them to rise for about an hour; they won’t necessarily double in bulk.

Bake the kolaches in a preheated 350°F oven for 15 to 20 minutes, till they’re golden brown. Remove them from the oven, and serve warm, or at room temperature.

Notes
*I didn't get a picture, but mine came out looking like your average grocery store danish, not very tall at all, but they have a lovely texture.
*I'm sure you could substitute just about any frozen berry for the strawberries without any complications.
*There are loads of other filling recipes online.
*I only got two out of the 4 pans of assembled kolaches baked before we had to leave for the vigil mass; the remaining pans were left out for ~4 hours and there was not a noticeable difference between the them and the ones that had risen for an hour.