Preheat your grill to medium-high heat, ensuring it reaches about 375°F.

Season the ground beef with salt and pepper, mix gently, and divide into four patties, making an indentation in the center of each.

Crumble fresh goat cheese into each indentation.

Grill the patties for about 4-5 minutes on each side.

Toast the buns on the grill cut-side down during the last minute of cooking.

Assemble the burgers with fresh spinach, grilled patties, tomato slices, and red onion, drizzling with balsamic glaze.