Vegetarian Casserole
["3 large potatoes", "1/2 c. yogurt", "1/2 c. fresh chives, minced", "1/2 c. fresh parsley, minced", "1 1/2 Tbsp. butter", "1 large onion", "1 clove garlic, minced", "4 large carrots, chopped", "2 stalks sliced celery", "1 lb. mushrooms", "2 large zucchinis", "1 green bell pepper", "1/4 tsp. thyme", "1/2 tsp. basil", "1/2 tsp. oregano", "1 c. frozen peas", "3/4 c. tomatoes", "3/4 c. grated Cheddar cheese", "1 Tbsp. cider vinegar", "1/4 tsp. paprika", "1/4 tsp. pepper", "1 c. spinach (optional)", "1 c. broccoli (optional)"]
["Cook potatoes in boiling water until soft.", "Drain and mash potatoes and mix with yogurt (or 1/4 cup milk), chives and parsley.", "Set aside."]
["potatoes", "yogurt", "fresh chives", "fresh parsley", "butter", "onion", "clove garlic", "carrots", "celery", "mushrooms", "zucchinis", "green bell pepper", "thyme", "basil", "oregano", "frozen peas", "tomatoes", "Cheddar cheese", "cider vinegar", "paprika", "pepper", "spinach", "broccoli"]