Preparation Melt butter in heavy large saucepan over medium heat. Add leeks and sauté until soft, about 5 minutes. Add asparagus and stock; bring to boil. Reduce heat to medium, cover and simmer until asparagus is tender, about 8 minutes. Add spinach, cover and simmer until wilted, about 4 minutes. Working in batches, puree soup in blender until smooth. Transfer soup to large bowl; season to taste with salt and pepper. Cool, then cover and chill until cold, at least 2 hours and up to 1 day. Mix crabmeat, 1 tablespoon lemon juice and shallot in small bowl. Season to taste with salt and pepper. Mix avocado and remaining 1 tablespoon lemon juice in another small bowl; mash coarsely. Season to taste with salt and pepper. Place tomato can or biscuit cutter in center of 1 soup bowl. Spoon in 1 tablespoon avocado mixture; smooth top. Spoon in 1 tablespoon crab mixture; press lightly to compact. Spoon in 1 tablespoon avocado mixture. Top with 1 teaspoon caviar. Carefully lift off can. Repeat in remaining soup bowls with remaining timbale ingredients. Ladle soup around each timbale. Serve immediately.
Preparation Melt butter in heavy large saucepan over medium heat. Add leeks and sauté until soft, about 5 minutes. Add asparagus and stock; bring to boil. Reduce heat to medium, cover and simmer until asparagus is tender, about 8 minutes. Add spinach, cover and simmer until wilted, about 4 minutes. Working in batches, puree soup in blender until smooth. Transfer soup to large bowl; season to taste with salt and pepper. Cool, then cover and chill until cold, at least 2 hours and up to 1 day. Mix crabmeat, 1 tablespoon lemon juice and shallot in small bowl. Season to taste with salt and pepper. Mix avocado and remaining 1 tablespoon lemon juice in another small bowl; mash coarsely. Season to taste with salt and pepper. Place tomato can or biscuit cutter in center of 1 soup bowl. Spoon in 1 tablespoon avocado mixture; smooth top. Spoon in 1 tablespoon crab mixture; press lightly to compact. Spoon in 1 tablespoon avocado mixture. Top with 1 teaspoon caviar. Carefully lift off can. Repeat in remaining soup bowls with remaining timbale ingredients. Ladle soup around each timbale. Serve immediately.