Tortellini Minestrone without sprinkles

2 tablespoons butter or 2 tablespoons margarine 1 medium red onion , sliced 2 small yellow squash, sliced (about 8 oz) 1 clove garlic , chopped 5 cups beef[...]

2 teaspoons vegetable oil 2 teaspoons chopped fresh garlic 1/2 cup chopped onion 1/2 cup chopped carrot 1/2 cup chopped celery 4 cups vegetable stock 1[...]