If using dry beans, soak overnight. The next day, cook according to package instructions. If using canned black beans, skip this step.
Shred the zucchini and onion. Place in a fine mesh strainer and use a paper towel to squeeze as much liquid as you can out of the vegetables. The more liquid you remove, the more likely your patties will remain intact while cooking!
Drain the beans of all liquid and place in a large mixing bowl. Add drained zucchini and onion.
Fine dice the jalapeño. Add jalapeño and corn to black beans. Add all spices (salt, pepper, cumin, paprika and garlic) as well.
Stir thoroughly to combine, making sure to mash most of the beans in the process.
Add egg, or egg substitute, to the black bean mixture. Stir thoroughly again.
Add panko bread crumbs and optional chia. Eyeball the amount added until you reach the consistency of a burger patty. I typically need about 1 1/2 cups.
Let the black bean mixture sit for 5 minutes so the seeds and crumbs can absorb the moisture.
Form into patties and place on a cookie sheet lined with parchment paper. Place the patties in the refrigerator for at least 30 minutes to help them hold together. Lift from the parchment paper once or twice during this time to prevent sticking.
If planning to freeze: after refrigerating, place cookie sheets in the freezer. Freeze in a single layer, lifting occasionally to make sure they don't stick to the parchment paper, for 8-12 hours. After they are completely frozen, you can place them together in a large freezer bag and store for 4-6 months.
If planning to cook: heat oil of choice in a frying pan. Cook patties for 3-4 minutes on each side, until lightly browned. Serve in a bun with your favorite burger toppings!