Heat large skillet on medium-high heat.
Once skillet is hot, add olive oil.
Add onion, bell pepper, 1/2 garlic powder, salt, pepper and paprika. Sauté for 5 minutes or until onion is transparent.
Add cremini mushrooms. Cook for an additional 2-3 minutes.
Push sautéed vegetable mixture to one side of the skillet. Add pre-boiled potatoes to other side of skillet and add other half of seasoning mixture. Let cook for 4-5 minutes before combining the potatoes with the vegetables.
Cook combined potato and vegetable mixture for another 5 minutes ensuring all potatoes have browned.
Add tomatoes and cook for another 2 minutes.
Serve hot with a garnish of sliced avocado if desired. Enjoy.