Slice the sweet potatoes into thin uniform slices, and toss in the avocado oil, then sprinkle lightly with sea salt.
Grill the sweet potatoes on low for about 5 minutes on each side. Keep a close eye, the cooking time may vary per grill. Turn the sweet potatoes when they start to turn golden brown on the edges.
Once the sweet potato bites are grilled, spread them out on a plate or platter and top each slice with avocado or tomato.