Rye Sour Starter

Name: Rye Sour Starter
Prep time: 20 min
Total time: 20 min
Cuisine: American
Ingredients: ½ cup rye flour; ⅛ teaspoon active dry yeast; 1 cup warm water (110 degrees F); 1 tablespoon crushed caraway seeds; 1 teaspoon minced onion; ½ cup water; 1½ cups rye flour; 1 recipe Sour Starter; ½ cup warm water (110 degrees F); 1 cup rye flour; ½ cup water (use warm water if sour has been refrigerated); 1 cup rye flour (or more)