Form bison into 2, ¼-inch patties + season with salt/pep; heat 1 tbsp oil in skillet over med-high, cook 3-4 min per side + rest 2-3 min (meat keeps cooking after taken off heat—don't overcook for best results)

Meanwhile, slice ½ the package of tomatoes in half + add to a bowl; wash/dry then roughly chop 3 cucumbers + parsley; add to bowl, season with salt/pep, the juice from half a lemon + 1 tsp oil; toss + set aside

Toast 2 pitas until warm + golden; divide to plates

Divide burgers + veggies to pitas, wrap them up to make sandwiches