Add ground chicken, prepared couscous, basil pesto, sliced scallion, roasted red peppers, parmesan, garlic powder and egg to a medium mixing bowl. Mix well with hands until well incorporated. Form into 4 equal patties, and refrigerate on a parchment-lined sheet or plate for 1 hour (or up to overnight) to firm up the burger patties. If refrigerating overnight, cover with plastic wrap.
While the patties are firming up, make your mayo and bruschetta.
To make the pesto mayo, whisk the mayo and pesto together until well combined. Transfer to a bowl or container, and refrigerate until ready to use.
To make the bruschetta topping, combine the chopped tomato, thinly sliced basil leaves, balsamic glaze, olive oil and salt and pepper in a bowl. Toss to coat the tomatoes and basil. This can be done right before serving the burgers, or up to 1 hour in advance.
After the burger patties have firmed up in the refrigerator, heat 1 tablespoon olive oil in a medium non-stick frying pan over medium heat for 2-3 minutes, until oil is shimmering but not smoking. Salt the burgers lightly, and carefully transfer burgers to the pan (burgers will be delicate) and cook over medium heat for 4 minutes. Carefully flip burger over, top with sliced cheese, and cook 5 minutes more, covering the pan with a lid for the last 2 minutes to really melt the cheese.
While the burgers cook and the cheese melts, toast your burger buns in a lightly buttered pan, cut side down- or cut side up under a broiler (dry, or brushed with a bit of melted butter) for 1-2 minutes, checking to make sure they do not burn.
Spread the pesto mayonnaise on the bottom of each toasted bun. Place the burgers on top of the mayo, and top each burger with bruschetta, and top bun. Makes 4 burgers.