Begin by preheating your oven to 350°F (175°C). Prepare a baking sheet by lining it with parchment paper.
Pat the duck breasts dry with paper towels. Score the skin of the duck in a criss-cross pattern, being careful not to cut into the flesh.
In a small bowl, mix together the ground cumin, smoked paprika, garlic powder, salt, and black pepper.
Rub the spice mixture all over the duck breasts.
Heat olive oil in a skillet over medium-high heat. Place the duck breasts skin-side down and cook for 5 minutes until the skin is golden and crispy.
Flip the duck breasts and sear the other side for 1 minute.
Transfer the duck breasts to the prepared baking sheet and bake in the preheated oven for 12-15 minutes, or until the internal temperature reaches 135°F (57°C) for medium-rare.
While the duck is cooking, prepare the orange salsa. Combine the orange segments, red onion, cilantro, jalapeño, and lime juice in a bowl. Toss gently and set aside.
Remove the duck from the oven and let it rest for 5 minutes. Then slice thinly against the grain.
To assemble the tacos, place a few slices of duck on each almond flour tortilla.
Top with orange salsa, sliced avocado, and crumbled feta cheese.
Serve immediately and enjoy your Keto Duck Tacos with Orange Salsa.