Tender Roast Dinner on a Budget, Ribeye of Pork w/ Gravy, Creamy Parsnip, Roasted Peaches w Bourbon

Pork loin blade roast is as tender as beef just don't overcook it. paired with creamy parsnip puree and roasted peaches and you've got yourself a roast dinner they will ask for on a pork budget. Mangia!
3-4lb Pork Loin Roast
2t kosher salt
1/2t black pepper
2T flour
2 yellow onions
2-3 celery ribs
3 carrots
1 head garlic
2c chicken stock
1t cornstarch
Parsnip Purée
2lbs parsnips
1t kosher salt
1c heavy cream
1c water
3T cold butter
Roasted Peaches
5-6 peaches
2T brown sugar
2T butter
2t vanilla
2oz bourbon
fried sage garnish