2 (10 ounce) boxes Horizon Organic Cheddar Cheesy Deluxe Mac and Cheese
2 (5 ounce) cans tuna in water, drained and flaked with a fork
1 (16 ounce) bag frozen peas (not thawed)
Optional topping: 1/2 cup Panko breadcrumbs combined with 2 tablespoons melted Horizon Organic butter; sliced green onions