Heat olive oil in a large saute pan over medium high heat. Add sliced mushrooms and cook, stirring occasionally until browning and soft, about 8-10 minutes. Turn down the heat to medium. Add 2 Tablespoons more olive oil, onions, garlic, salt, spice blend, and pepper. Cook 3-4 more minutes, stirring occasionally.
Add peas and cook for 8 minutes or until peas are warmed through. Serve with rice, over pasta, or alongside a heartier main dish.
*If you don't have the spice blend on hand, you can add 1/2 teaspoon allspice and 1/4 teaspoon sumac instead.