Line a baking sheet with parchment paper or a silicone mat and set aside.
Grate beets, carrots, and zucchini. Set aside.
Grind oats into flour and place in a large mixing bowl.
Add the grated carrot, zucchini.
Add the kale, peanut butter, tomato paste, lemon juice and 1 teaspoon seasoning of your choice. Mix together well with your hands. Taste and add more seasoning if desired.
Once mixture is well mixed, spoon it into a food processor. Process until mixture is smooth.
Transfer mixture in a separate large mixing bowl. Continue mixing until well combined.
Spoon a heaping tablespoon onto the parchment-lined sheet into a biscuit cutter. Press down and shape mixture with the back of a spoon. Remove biscuit cutter and repeat, making 6 patties per sheet. If you haven't got a biscuit cutter just shape into 1 inch thick 3-1/2 inch patties with your hands.
Place filled pan into oven and bake for 25 minutes.
Remove from oven, flip patties and bake for another 20 minutes.