Measure 3 cups of dry instant rice and cook it according to the package instructions, then set aside
Combine the onion, garlic, carrots, olive oil, salt, and pepper in a large skillet
Sautee for 10 - 15 minutes on medium high heat, until carrots start to soften and onions become translucent
Add the peas, broccoli, mushroom soup, 1 ½ cups parmesan cheese, and 1 cup of sharp cheddar cheese to the skillet
Stir the mixture over medium heat until heated through, about 10 - 12 minutes
Add the cooked rice and parsley to the skillet and stir to combine
Transfer the veggie casserole mixture to a 9 x 13 casserole dish
Top with the remaining 1 cup of parmesan cheese and 1 cup of sharp cheddar cheese
Bake the casserole at 400 degrees for 10-15 minutes , until the cheese is bubbly and beginning to brown