Preheat grill or grill pan. Slice cauliflower into “steaks;” 1 inch thick slices. Brush both sides with arugula chimichuri. Grill over medium heat on grill about 3-5 minutes per side or over medium-high heat on grill pan 5-7 minutes per side, until cauliflower is tender and slightly charred.
Heat tortillas on grill, 30 seconds per side.
Crumble or chop cauliflower steaks into bite sized pieces. Assemble tacos: star with cauliflower, add shredded cheese, tomatoes, slides avocado, and top with a drizzle of arugula chimichurri.
Recipe by The Two Bananas at https://thetwobananas.com/grilled-cauliflower-tacos/