Peel and dice the onion.
Heat a large pot with olive oil. When hot, sauté the onion until translucent.
Crumble the tofu between your hands and add it to the pot. Sauté for 5 minutes.
Drain and rinse the canned kidney beans and corn.
Add the diced tomatoes, kidney beans, corn and seasoning to the pot. Simmer for 15 minutes.