1 c oil
1/3 c vinegar
1/4 c parsley, minced
1 T dried basil
1 T sugar
1 t salt
1/2 t pepper
1/2 t dry mustard
1/2 t garlic powder
1 sweet onion
6 tomatoes, sliced

Mix first 9 ingredients. Layer onions and tomatoes in shallow dish. Pour marinade over. Cover and chill.

Preparation time: 15 minutes
Marinade time: 1 - 24 hours