Heat a deep, non-stick skillet over medium high heat. Add the onion and cook, stirring, until it begins to brown. Add the pepper, jalapeno, and garlic, and cook for another 2 minutes, taking care not to burn the garlic.
Add the remaining ingredients, stir, and cook, stirring frequently, for about 15 minutes. If it becomes too dry, add a little vegetable broth or reserved tomato juice. Check the flavor, and add salt and additional seasonings to taste.
Roll in a tortilla with lettuce and tomato for a delicious burrito.