Preheat oven to 450°; drain beans, then rinse + pat dry; toss with 1-2 tbsp oil, salt/pep + seasoning blend; scatter beans on sheet pan + roast 25-30 min, flipping 2-3 times throughout cooking, until beans are crisp on the outside but soft in the middle

Meanwhile, stack 4 tortillas on a plate + wrap with a damp paper towel; microwave 15-30 sec or until warm + soft

Thinly slice ½ onion; drain + cut beets into quarters

Spread guac onto each tortilla; divide beets, beans + onions to each—time to eat!