Wipe 2 mushrooms with a damp paper towel, remove stems + scoop out gills; heat 1 tbsp oil in a skillet over med-high + cook mushrooms 2-3 min per side until browned + tender; add salt/pep + set aside

Heat 1 tbsp oil in skillet over med-high + sauté pepper mix with salt/pep 4-5 min or until soft + starting to brown

Meanwhile, toast 2 buns until warm + golden

Spread 1-2 tbsp tzatziki onto each bun, then top with mushrooms + pepper mix—nice job!