Marinade:
1 3/4 cups vegetable oil
1/2 cup cider vinegar
1/2 cup sugar
1 teaspoon dry mustard
2 cloves garlic minced
2 teaspoons salt
Freshly ground pepper to taste
Salad:
1 8 1/2-ounce can lima beans drained
1 8-ounce can green beans cut, drained
1 8-ounce can kidney beans drained
1 sweet onion medium, sliced and separated into rings
1/2 cup green bell peppers chopped
2 cups cucumbers thinly sliced
2 cups carrots pared and thinly sliced
1/2 cup celery chopped
2 cups mushrooms fresh, washed and thinly sliced
2 cups cauliflower sliced
Lettuce, washed and crisped
Combine marinade ingredients in blender or food processor and process until well blended.
Combine salad ingredients except lettuce in a large bowl; toss. Pour marinade over vegetables and toss until well coated. Marinate covered in refrigerator for 24 hours. Just before serving, drain. Place marinated vegetables into lettuce-lined bowl.
Note: Any leftovers will keep in the refrigerator for 3 to 4 days.