Preheat oven to 425°; mix potatoes with 1 tbsp oil, salt/pep + fave spices (we like garlic powder), then spread on a sheet pan; roast 15-18 min until tender

In a bowl, mix zest of 1 lemon, sheep cheese + salt/pep

Pat fish dry; using a sharp knife, cut a slit into the thick part of the halibut (careful not to cut to the other side)

Lightly oil baking dish; add fish, then drizzle fish with 1 tbsp oil, salt/pep + stuff with cheese mixture; bake 15-20 min until firm, opaque + halibut is cooked through

Divide halibut + potatoes between plates; drizzle aioli onto each, nice work!