Meat And Mashed Potatoes Burger

Directions

1. 1
   Make the masher: place the potatoes in a saucepan and cover by 1 inch with water.
2. 2
   Place over high heat and bring up to a bubble.
3. 3
   Add some salt and boil the potatoes until tender, about 12 minutes.
4. 4
   Turn off the heat.
5. 5
   Drain the potatoes and return to the pot; let them sit for a minute to dry out.
6. 6
   Add the cream, the butter, and egg.
7. 7
   Mash with a potato masher or fork.
8. 8
   Add the chives and season with salt and pepper; continue to mash to a fairly smooth consistency.
9. 9
   While the potatoes are cooking, start on the burgers-in a large bowl, combine the beef, Worcestershire sauce, parsley, and the grated onion (grate it right over the bowl so the juices fall into the meat); season with salt and pepper and mix thoroughly.
10. 10
    Score the mixture into 4 equal portions and form them into patties slightly thinner at the center that at the edges.
11. 11
    Heat the oil in a large skillet over med-high heat.
12. 12
    Cook the burgers, flipping once, 10 minutes for medium.
13. 13
    Slather the roll bottoms with mustard and top with the watercress, burgers, and a pile of mashers.
14. 14
    The mashers will be the glue to hold the roll tops in place.