Heat olive oil in a large lidded skillet over medium heat. Add the sliced mushrooms and garlic and sauté until the mushrooms release some of their liquid and they start to lightly brown and become fragrant. Add the peas, mint, salt and pepper. Cover the pan with lid and cook until peas are tender, about 5 minutes.
Sprinkle the breadcrumbs over the mushrooms and peas and serve immediately or keep warm until ready to serve.