Pulse breadcrumbs, almonds, garlic, mint, lemon juice, and lemon zest in blender or food processor until coarsely chopped. Add oil and sesame seeds, and pulse several times to make chunky pesto.

Score an X in each zucchini wheel to within 1/2 inch of bottom, making sure not to cut through. Gently pry each wheel open, and stuff with 1 heaping teaspoon pesto. Place zucchini wheels snugly in single layer, stuffing-side up, in medium saucepan. Add 1 cup water, cover pan, and bring to simmer over medium heat. Cook 20 minutes, or until zucchini are tender. Serve hot, with cooking liquid drizzled over top.