Step 1
Wash summer squash thoroughly under cold running water, rinsing any soil or other debris away.
Step 2
Place squash on a clean chopping block or cutting surface. Slice the squash crosswise into circles, each about 1/2-inch thick, leaving the skin intact. Discard the stem and tip, keeping only the fleshy parts of the squash.
Step 3
Sprinkle a light layer of lemon pepper on each side of the squash circles. Set them aside on a clean plate.
Step 4
Coat the grill cooking grate with a light layer of vegetable oil grilling spray.
Step 5
Set up the gas or charcoal grill for direct grilling and ignite the grill. If using a gas grill, this means selecting the appropriate burner (see your grill's manual). If using a charcoal grill, this means spreading coals into an even layer under the grate.
Step 6
Close the grill lid and allow the grill to heat to about 350 F.
Step 7
Open the grill lid and place the squash circles on the cooking grate directly above the heat source. Leave about 1/2 inch of space between each piece so heat can get between the sections and cook the squash evenly.
Step 8
Grill the squash until it is just tender and slightly browned, about eight minutes on each side. Carefully turn the squash with the long-handled tongs so pieces don't tear off or slip between the grill grates into the flames.
