Pan fry Spam on non stick pan with little oil or no oil at all, charred the surface for slightly burn taste on high heat, around 1 min each side and remove from pan.
1
Dribble olive oil on onion and charred on non stick pan on high heat to get the sweetness flavor. do not overcook, and try to keep onion intact.
2
Sprinkle a little salt on sliced tomatoes.
3
Arrange all on plate, drizzle a little olive oil and red wine vinegar on top, finish with a dash of black pepper.