Air Fryer Garlic Herb Sirloin with Brussels Sprouts and Mushrooms

This air fryer sirloin dinner is built for steady blood sugar and real flavor. Tender beef sirloin cooks evenly to a USDA safe 145 degrees Fahrenheit, while Brussels sprouts and mushrooms roast until caramelized and savory. It is the kind of air fryer meals keto eaters and diabetics can rely on, with smart portions, clean ingredients, and only 5.5 grams of net carbs per serving. Why is this recipe so diabetes friendly? Sirloin provides high quality protein with moderate fat, which supports satiety and steadier post meal glucose. Non starchy vegetables add fiber and micronutrients without spiking carbs. The balance of protein, healthy fats from olive oil, and fiber helps slow digestion and blunt glucose response. If you are looking for variety, this approach fits neatly alongside favorites like keto air fryer ribeye, keto air fryer salmon, and even an air fryer beef liver low carb recipe. The seasoning is simple and intentional. Fresh rosemary, thyme, garlic, lemon, salt, and pepper let the beef shine without sugars or starches. Brussels sprouts and mushrooms roast beautifully in the air fryer, becoming crisp at the edges and tender inside. This keeps the meal within keto friendly macros and suitable for diabetic meal planning, similar to how you would approach keto air fryer bacon as a side or topping in moderation. For best results, pat the steaks dry, season generously, and let them absorb the garlic herb rub for 10 to 15 minutes. Preheat your air fryer for consistent heat. Use a [digital meat thermometer](https://rocktopgear.com/amazon) to confirm the steak reaches 145 degrees Fahrenheit, then rest the meat 3 minutes before slicing as the USDA recommends. If you like cooking the vegetables at the same time, a [dual basket air fryer](https://rocktopgear.com/amazon) makes it easy to manage different cook times. Serve with a lemon wedge or a dollop of herb butter if your macros allow, and add a side of cauliflower mash for extra comfort that keeps carbs low. Leftovers store well in an airtight container for up to 3 days. Reheat in the air fryer at 350 degrees Fahrenheit until warmed. For broader education and meal inspiration, visit [Keto Recipes](/blog/keto-basics), and explore our take on nutrient dense organ meats in [Air Fryer Beef Liver](/recipes/air-fryer-beef-liver). Variations are simple. Swap mushrooms for green beans or zucchini, or add a few strips of crumbled keto air fryer bacon for texture. If you prefer more color, toss in a few red bell pepper strips and keep portions modest to stay under 10 grams net carbs per serving. These small tweaks keep your plate fresh while staying true to blood sugar friendly cooking.

Prep: 15 min. Cook: 18 min. Servings: 2.

Ingredients

• Beef sirloin steaks, 2 pieces, 5 oz each (about 142 g each)
• Brussels sprouts, trimmed and halved, 160 g
• Cremini mushrooms, sliced, 160 g
• Extra virgin olive oil, 2 tbsp (28 g), divided
• Fresh rosemary, minced, 1 tsp
• Fresh thyme leaves, 1 tsp
• Garlic, minced, 1 medium clove (3 g)
• Fresh lemon juice, 2 tsp
• Smoked paprika, 1/2 tsp
• Kosher salt, 3/4 tsp, divided
• Freshly ground black pepper, 3/4 tsp, divided

Instructions

1. Pat the sirloin steaks dry. In a small bowl, mix 1 tbsp olive oil, rosemary, thyme, garlic, lemon juice, 1/4 tsp salt, and 1/4 tsp black pepper. Rub the mixture on both sides of the steaks. Let sit at room temperature for 10 to 15 minutes.
2. In another bowl, toss Brussels sprouts and mushrooms with the remaining 1 tbsp olive oil, smoked paprika, 1/2 tsp salt, and 1/2 tsp black pepper.
3. Preheat the air fryer to 375 degrees Fahrenheit for 3 minutes.
4. Add the vegetables to the air fryer basket in a single layer. Air fry at 375 degrees Fahrenheit for 10 to 12 minutes, shaking halfway, until Brussels sprouts are browned at the edges and mushrooms are tender.
5. Increase the air fryer temperature to 400 degrees Fahrenheit. Place the seasoned steaks in the basket. Air fry for 8 to 10 minutes, flipping halfway, until the internal temperature reaches 145 degrees Fahrenheit. Use a [digital meat thermometer](https://rocktopgear.com/amazon) for accurate readings.
6. Transfer steaks to a cutting board and let them rest for 3 minutes as required by the USDA. Plate with the roasted vegetables and serve with a lemon wedge if desired.

View full recipe on Low Carb Air Fryer