Hamburger Stroganoff

Ingredients

• 1 lb. ground beef
• 1 medium onion
• 1 tsp. garlic salt
• 1 tsp. celery salt
• 1 pkg. egg noodles
• 1 can cream of mushroom soup
• 1 can cream of celery soup
• 1 (8 oz.) can mushroom stems and pieces, drained
• 2 Tbsp. flour
• 1/4 tsp. pepper
• 1 small container sour cream