Flat Iron Steak With Cilantro Pesto Sauce and Red Mashed Potatoes

Name: Flat Iron Steak With Cilantro Pesto Sauce and Red Mashed Potatoes
Prep time: 1 h 30 min
Cook time: 40 min
Total time: 2 h 10 min
Cuisine: American
Ingredients: 2 cups cilantro; 1 small to medium jalapeno; 1/4 cup roasted pecans; 2 cloves of garlic; 1/4 cup of lime juice; 1/2 cup grated parmesan; salt and pepper to taste; 1/2 cup of vegetable or canola oil; 2-4 pounds of flat iron steak; 3 pounds of red potatoes; 1 stick of butter; 1/2 cup sour cream

1 step

Prep:1h 30minCook:40min

A delicious fusion of Southwestern and Italian flavors, featuring tender, perfectly grilled medium-rare flat iron steak topped with a vibrant, homemade cilantro pesto sauce. Fresh cilantro, jalapeño, roasted pecans, garlic, Parmesan cheese, and lime juice come together to create a rich, zesty, slightly spicy sauce that's the true star of the dish. Served alongside creamy, buttery red mashed potatoes, this meal delivers a wonderful balance of savory, tangy, and fresh flavors. The steak and potatoes are delicious on their own, but they're really just an excuse to enjoy more of that irresistible cilantro pesto!

Updated at: Sun, 18 Oct 2026 22:19:34 GMT

Nutrition balance score

Good

Glycemic Index

Moderate

Glycemic Load

High

Nutrition per serving

Calories1199.6 kcal (60%)

Total Fat87.9 g (126%)

Carbs48.6 g (19%)

Sugars5.1 g (6%)

Protein54 g (108%)

Sodium577.8 mg (29%)

Fiber5.7 g (20%)

% Daily Values based on a 2,000 calorie diet

Ingredients

4 servings

2 cupscilantro

1jalapeno

small to medium

¼ cuproasted pecans

2cloves of garlic

¼ cuplime juice

½ cupgrated parmesan

½ cupvegetable oil

or canola

2 poundsflat iron steak

3 poundsred potatoes

1 stickbutter

½ cupsour cream

Instructions

Step 1

Pesto Sauce Mix all ingredients in a blender and refrigerate overnight. Adjust ingredients based on taste. Steak Dry flat iron steak, bring to room temp, and season with salt and pepper. Cook on the grill until Medium Rare. Mashed Potatoes Boil potatoes until soft, drain and mash with 1 stick of butter and 1/2 cup sour cream. Salt and pepper to taste.