Process almonds, garlic and 1/4 cup breadcrumbs in a food processor until nuts are nearly ground, 10 to 15 seconds. Add red peppers, tomato, oil, vinegar, cayenne and 1/2 teaspoon salt. Pulse, scraping down sides of the bowl as necessary, until mixture has texture similar to mayonnaise, 20 to 30 seconds more. Add additional 1/4 cup breadcrumbs as needed to achieve desired consistency. Adjust seasoning with salt and pepper. Serve with roasted vegetables.