Heat oil in a large skillet or Dutch oven over medium high heat. Add onions and cook for 4-5 minutes, until soft.
Add bell peppers and cook for 4-5 minutes. Stir occasionally. Add garlic and cook for 3 minutes until fragrant.
Add tomato paste and green chilies and stir to combine. Cook for 3 minutes.
Add ground meat and brown or add vegetarian option, breaking apart into crumbles, continue to break into small bits as it cooks, about 5-7 minutes. If using meat that yields fat, transfer to a colander lined with paper towels and drain.
Add ground meat back to the skillet (if removed to drain) and stir well. Add chili powder, paprika, salt and pepper and stir well.
Deglaze the pan by adding crushed tomatoes or tomato sauce. You can also deglaze using red wine or balsamic vinegar about ¼ cup). Allow tomatoes to simmer until heated through about 5 minutes.
Add remaining ingredients: mustard, ketchup, honey or brown sugar, Worcestershire sauce, salt, red pepper flakes and black pepper. Stir well to combine.
Cook over low-medium heat for 15-20 minutes, until mixture has thickened to your liking. If you have the time, the flavors will meld, develop further and color will deepen if you allow your mixture to simmer for 1-2 hours on low. Just keep the heat low and stir occasionally to prevent sticking or burning. Watch the sauce so that it doesn’t reduce too much. When too much of the sauce reduces, it gives you a dry sloppy joe mixture. Everyone has a preference, but for me, I cook it down so that I can see the bits of meat, and when I drag my spoon through the sauce, it leaves a trail where the sauce is parted. If the sauce immediately flows back into that trail, it’s too liquid-y.Remove from heat and serve over toasted buns. Serve with a side salad, some baked beans, and — of course — thickly-sliced pickles and onions on top of your Sloppy Joes, and…dinner is served!Perfect for lunch the following day. The sauce in Sloppy Joe recipes are normally intended to be slightly sweet, but it's really a matter of taste. If you prefer a more savory sauce, use less honey or brown sugar. If you'd like to make this meal even healthier by packing in some extra veggies unbeknownst to your kids, add small diced carrots or mushrooms.