Kitchen Cupboard Chicken Casserole

• 2 chicken breasts (whole)
• 240 ml sour cream
• 210 gr rigatoni
• 180 ml mayonnaise
• 120 gr monterey jack cheese (grated)
• 4 gr thyme
• 1 package cream of mushroom soup
• 1 package onions i use durkee (fried)
• 1 package green beans
• 1 package mushrooms quartered (whole)