Place the fish filet(s) in a shallow dish and squeeze the juice from 1 lemon over the fish. Season with a little salt and pepper.
Grill the fish until cooked through, about 6 minutes on each side. Grilling time may vary depending on thickness of the fish filets and heat of the grill. If desired, grill the corn tortillas for about a minute each to warm them up and give them some grill marks.
While the fish is grilling, mix up the coleslaw in a large mixing bowl. Add the coleslaw mix to the bowl.
In a small resealable container, add the olive oil, vinegar and juice from 1 lemon with the dill and a little salt and pepper. Shake vigorously and then pour over the coleslaw mix and toss well. Give it a taste and add more salt and pepper if needed.
Once the fish is cooked, slice it into pieces that will fit into the taco. Add a few bites of fish to each corn tortilla and top with coleslaw.
Serve Grilled Fish Tacos with Coleslaw, optional mozzarella cheese garnish, and some fresh fruit.