Place the potatoes in a pot and cover them with water. Boil until they are tender and then drain, reserving ¼ cup of the cooking liquid.
To the pot with the potatoes, add the heavy whipping cream, 2 Tbsp of the butter, the chives and salt, and pepper to taste. Mash the potatoes well. Add in the reserved cooking liquid as needed.
Preheat the oven to broil on high.
On a sheet pan, mix together the snap peas and shrimp.
Drizzle the shrimp with olive oil, thyme, garlic, remaining butter, and salt and pepper to taste.
Broil for 8 minutes.
Top the potatoes with the shrimp mixture and serve.
Enjoy!