Creamy Pasta Salad with Carrots

Grate 1 large carrot
Dice 1 celery stalk
8 oz cheddar cheese cut into small cubes
Boil 1lb Rotini pasta with 1 tsp salt
Dressing:
1 1/2 cups mayonnaise
1/4 cup vinegar
1/2 cup sugar
1 tsp each salt and pepper
10 oz frozen peas (thawed)