Preheat the oven to 375F
Make the herb rub by combining all the spices in a small bowl.
Place the pork roast into a large roasting pan.
Rub the roast with a small amount of olive oil, then sprinkle the herb rub over the entire roast, making sure it's all well covered.
Let the roast rest in the roasting pan while you chop the vegetables.
Chop all the vegetables into 1 inch pieces. This should be a rough chop so that the vegetables retain their shapes during the long roasting period.
Add the vegetables to the roasting pan and distribute them evenly around the pork roast.
Add the 2 cans of consomme or broth to the pan.
Roast, uncovered, at 375F for 30 minutes, then reduce the heat to 325F.
Continue roasting for 2 - 3 hours, depending on the size and thickness of the pork roast. The internal temperature of the finished roast should be 165 degrees.
Remove the pork roast from the pan to a serving platter. Cover lightly with foil and let it rest.
Strain out the vegetables and place them into the food processor or blender.
Remove excess fat from the pan juices, then add the juices to the food processor.
Process on low just till the carrots have broken up, then pulse just till all is mixed together.
Don't over process the gravy or it will thicken too much and resemble baby food!
Serve the root vegetable sauce over mashed potatoes and slices of the herbed pork roast.