Bourbon Bacon Jam

Name: Bourbon Bacon Jam
Ingredients: 1 pound bacon, cut into ½ inch pieces; 3 tablespoons bacon grease (acquired from the cooked bacon); 1 1/2 cups onion, chopped; 4 garlic cloves, roughly chopped; 1 rosemary sprig; 1/2 cup bourbon (whiskey); 1/4 cup balsamic vinegar; 1/2 cup water; pinch cayenne (or up to 1/4 teaspoon); 1/4 cup brown sugar; kosher salt