Meanwhile melt butter and 1 tbsp. olive oil over medium high heat. Add onions, mushrooms, bell pepper, 4 cloves chopped garlic, garlic powder, and onion powder. Cook about 8-10 minutes until onions are translucent. Remove from heat and set aside.
Chop remaining garlic cloves finely and mix with tbsp. olive oil. Spread garlic olive oil on pizza crust. Top with Monterey Jack cheese, onion & pepper mixture, then mozzarella cheese.