Spread kale leaves onto a sheet pan. Use two pans if they’re too packed on one. Toss with olive oil and then bake for 8 to 12 minutes until leaves are crispy. If they start to brown too much at the edges, they’re definitely done! Sprinkle with some salt right out of the oven.
When the kale chips are done baking, increase the oven’s temperature to the recommended heat for the fish patties. Cook the fish according to package directions.
When the fish is nearly done cooking, toast the hamburger buns.
Assemble the sandwiches by spreading buns with tartar sauce and adding the lettuce and fish. Squeeze the lemon juice (portion for fish) over top of the fish patties. Enjoy with kale chips!