Vegan burgers

Name: Vegan burgers
Prep time: 15 min
Cook time: 45 min
Total time: 45 min
Yield: 10 portions
Ingredients: 40 g linseeds (flaxseeds); 80 g shelled walnuts; 225 g fresh portobello mushrooms; 225 g fresh Swiss brown mushrooms; ½ brown onion; 2 garlic cloves; 20 g extra virgin olive oil; 200 g cooked rice; 1 can cannellini beans; 50 g panko breadcrumbs; 30 g balsamic vinegar; 30 g tamari; ½ tsp smoked paprika; 1 tsp sea salt; ½ tsp ground black pepper; 8 - 10 hamburger buns; vegan mayonnaise; mustard; 8 - 10 leaves letucce; 3 tomatoes; ketchup