Mediterranean Veggie Burgers

few tablespoons of olive oil

small yellow or red onion, diced

roasted red pepper, diced

artichoke hearts, diced (canned, frozen or jarred)

garlic, minced

heaping cups cooked chickpea or cannellini beans (or 2 cans (14 ounce) drained and rinsed)

green or black olives, diced

feta cheese, crumbled

mixed fresh herbs like parsley, thyme, and basil, minced

seasoned breadcrumbs

sea salt and fresh black pepper

Mayonnaise:

mayo

heaping tablespoons capers

fresh lemon juice, to taste

For serving:

soft buns

baby spinach leaves

sliced tomatoes