Put the oats, fennel seed, onion and garlic in a food processor. Pulse until coarsely chopped.
Add a little more than half of the beans, the parsley, rosemary, and tomatoes and pulse until almost smooth. Add the egg and process until everything is blended.
Spoon the mixture into a bowl. Add the remaining beans and salt and pepper to taste. Stir to combine.
Form the mixture into four patties. Spray a plate with cooking spray and place the patties on the plate. Cover with plastic wrap and chill for at least 2 hours.
Heat a large skillet and add the olive oil. Put the patties into the pan and cook over medium high heat for 4 minutes or so. You want a nice golden brown.
Flip the patties over and continue to cook another 4 minute or so until the second side is equally as golden as the first.
Serve on buns or sandwich thins with the garnishes of your choice.