My Avocado Sandwich

Ingredients

• 1 Medium, sweet yellow onion, cut in 1/4-inch slices 
• 4 Small Olives, cut in 1/4-inch slices 
• 2 Tablespoons canola oil 
• Salt & freshly ground black pepper, to taste 
• 1/2 Tablespoons extra virgin olive oil 
• 1 Teaspoons chopped fresh thyme leaves 
• 8 thin avocado slices
• 1/4 cup Italian salad dressing
• 1 tablespoon mayonnaise
• the whole wheat bread -- toasted