Rub salt and pepper on both sides of steaks.
Coat a large skillet with olive oil over medium-high heat; add steaks and sear for 4 minutes per side or until desired level of doneness is achieved; remove from skillet and keep warm.
Coat the skillet with a little more olive oil then reduce heat to medium. Add red and yellow bell peppers, garlic, onion and mushrooms; sauté for 2 minutes or until onion becomes translucent.
Add tomatoes, balsamic vinegar, salt, pepper, thyme and oregano. Reduce skillet heat to low and allow mixture to simmer until tomatoes have reduced to a nice sauce.
Serve sauce over steaks.