Dice red onion and mince garlic cloves, then add to a pot with olive oil.
Sauté on medium high heat until onions and garlic are fragrant, around 2 minutes.
If using meat, add to the pot and cook approximately 3/4 of the way through.
Add in 1-2 tbsp chili spice blend and stir to combine well. If pot is dry, add a dash more of olive oil.
Reduce heat to medium-medium low, then add your cans of crushed tomatoes and diced tomatoes. Stir to combine.
Add in another tbsp of chili spice blend, or as much as you want to your taste preference.
Add in frozen corn and cook for around 1-2 minutes.
Add in kidney beans, white cannellini beans, and black beans and stir to combine.
Add salt and pepper to taste before serving.