Cook bacon in large pan til crisp. transfer bacon to paper towel lined plate; discard drippings.
Add tomatoes, onion, granulated sugar, brown sugar, vinegar, garlic, and pepper flakes to pan along with bacon. Bring mixture to a boil, stirring often. Simmer mixture, stirring occasionally til thick and jam like consistency, 1 1/4 to 1 1/2 hours. Stir in parsley and season with salt and black pepper