Slice your zucchini into quarters, length-wise and then cut the sticks in half, width-wise to create taco-sized zucchini strips.
Add the zucchini sticks to a bowl and toss with the olive oil, salt, and garlic powder.
Heat a grill to medium-high and grill zucchini for 3-4 minutes each side or under tender enough to easily pierce with a fork.
While the zucchini are grilling, prepare your tortillas by warming them, your chipotle crema, and your pickled red onions (see recipes below).
Once the zucchini is done grilling, place one to two strips in a warmed tortilla and top with avocado slices, chipotle crema, cotija cheese, pickled red onions, and cilantro. Serve with a lime on the side.