Preheat oven to 350°F. In a large mixing bowl, add all of the sauce ingredients and stir to combine, whisking if needed.
Add pork and beans (undrained), tomato sauce, and diced onion and bell pepper. Using a large spoon or spatula stir to combine beans with sauce.
Pour into casserole baking dish or cast iron skillet or dutch oven. Bake uncovered for 1 1/2 - 2 hours until bubbly and bacon is crispy. If crisper bacon is desired, with beans on middle rack, broil for 2-3 minutes until desired crispness is reached. Allow to rest for 10 minutes and serve warm.
Baked beans can be made ahead of time, refrigerate. Remove from fridge for 1 hour prior to baking, bake as directed.
Baked beans may be frozen, but only after they've been baked. Cool completely and transfer to freezer storage container. Beans are good up 7 days refrigerated; 6 months frozen.
GLUTEN FREE BAKED BEANSBe sure your beans (B&M are GF), Ketchup and all condiments are gluten free)