How To make Jamie's French Restaurant's Cold Avocado Soup a La Sylvia

2 tb Onions, chopped
2 Garlic cloves, crushed
1/2 Tomatoes
1 ts Olive oil
1 c Avocado pulp
1/2 tb Lemon juice
4 ds Chili powder
2 tb Mayonnaise
1/2 c Stock
1/2 c Cream, heavy
Saute onions and garlic in olive oil just until tender. Peel, seed, and finely chop tomato. Add to onions and cook a few seconds. Blend all ingredients and chill for 4-6 hours. Serve in bowls or cups and top with a twist of lemon or lime peel.