2 tablespoons olive oil
1 cup chopped onion
1 cup chopped green bell pepper
1/2 cup chopped celery
1 1/2 pounds ground beef
3 tablespoons chili powder
2 teaspoons ground cumin
1 teaspoon garlic powder
1 teaspoon dried oregano
1 teaspoon kosher salt
1/2 teaspoon freshly ground black pepper
1 (28-ounce) can crushed tomatoes
1 (28-ounce) can tomato purée
1 tablespoon tomato paste
1 (15-ounce) can kidney beans, drained and rinsed
1 (15-ounce) can pinto beans, drained and rinsed
Saltine crackers, for serving