I recommend the grill for 2 at Casablanca's.
They are right on the main road at the bend where it heads off from the shore towards the stadium on the way to the airport. It is alittle more pricier than your $15 per person limit but is cheaper in the long run. You get 2 sirloin steaks, 2 sausage links, lamb, 2 pork chops, a slab of ribs and a whole chicken plus salad, rice, bread and baked potatoe. We ate our fill at the restaurant and then took the left overs to our room and bought salad fixins and baked beans from the grocery store and ate 2 more days off it. So it turned out to be quite the bargan!!