recipe - Sweet potato salad

so i made this fantastic salad and added lamb the first time but added lentils the 2nd time I made it.
BASIC SALAD
1 large Sweet potato - diced and cooked until just soft
1 tin of diced beetroot
1 tin of chickpeas
1 tin of brown lentils
1 bag of baby spinach - hand broken
2 tablespoons of pine nuts (optional)
400g lamb (optional)

DRESSING
1 teaspoon mint leaves
1 teaspoon mixed herbs
salt and pepper to taste
1 lemon - juiced
1 tablespoon oil