Cut beef into 1 1/2-inch cubes, then rinse in warm water to clean.
Put beef into a medium sauce pot with 1 tablespoon olive oil. Add salt and pepper, to taste, and bouillon cubes.
Cover and place pot over low heat. Let it steam for 20 minutes.
Put 3 tomatoes, 1 red pepper, 1 onion, and 1 garlic clove into a blender and pulse to coarsely chop. Then pour tomato mixture into the pot with the beef and add the remaining 2 tablespoons of olive oil. Cook 15 minutes.
Stirring it on medium heat, add the remaining 3 tomatoes, cut into wedges, 1 sliced red pepper, 1 sliced onion, and 1 sliced garlic clove. Cook for 15 minutes and it's ready to serve.