Bring a medium pot of salted water to a boil and cook the brown rice linguine according to package directions until al dente.
While the pasta cooks, peel and devein the shrimp, then pat them thoroughly dry with a paper towel.
In a large skillet over medium heat, melt the grass-fed ghee.
Add the minced garlic and red pepper flakes to the skillet, sautéing for 1 minute until the garlic is fragrant and golden.
Increase the heat to medium-high and add the shrimp in a single layer, seasoning with sea salt and black pepper.
Cook the shrimp for 2 minutes per side until they are pink and opaque.
Drain the pasta, reserving 2 tablespoons of the starchy cooking water.
Add the cooked pasta, reserved water, lemon juice, and chopped fresh parsley to the skillet with the shrimp.
Toss everything together for 1 minute until the sauce coats the noodles evenly, then serve immediately.