Heat a large pot over medium heat, then add oil.
Add Italian sausage, break it up and brown it until about halfway cooked. Add red pepper flakes if you desire more heat.
Add onions and peppers, stirring occasionally and cooking for 4-5 minutes.
Add minced garlic, then cook for 1 minutes.
Add diced tomatoes, tomato sauce, salt, black pepper and Italian seasoning. Cook for 3 minutes.
Add bouillon, water and rice. Gently stir and push down until the liquid covers the rice.
Cover and turn up to Medium High heat. Once mixture is simmering, reduce heat to Medium Low.
Simmer for 20 minutes or until rice is cooked, stirring occasionally to prevent burning.
Remove from heat and let sit 5 minutes, then stir and serve.