Lemon Roasted Chicken and Cauliflower

whole chicken (cut into parts - ask the butcher at the grocery store to cut it for you)

head cauliflower (cut into florets with big stems removed)

lemon (thinly sliced (with peel left on))

garlic (minced)

lemon pepper (sold in spice aisle)

salt

olive oil

sprigs rosemary

water