Rush, who served over 23 years in the United States Army, is putting his biceps towards a cause that's close to his heart.
This Fourth of July, he teamed up with the USO's #Flex4Forces campaign, which invites Americans to show support for service members by flexing their biceps on social media, and asks others to do the same and make a donation.
Tens of thousands of Americans have participated so far to show their support for service members, including celebrities like Dwayne \"The Rock\" Johnson, Jessica Biel, Chris Pratt, Elizabeth Banks, Tim McGraw, Zosia Mammet and many more.
Rush flexed for \"GMA\" and nominated Arnold Schwarzenegger to take part in the challenge next. He also shared some of his favorite grilled dishes that you can try all summer long. Get the recipes below.
Chef Rush's Grilled Salmon
![\"PHOTO:](\"http://a.abcnews.com/images/Lifestyle/white-house-salmon-abc-er-180704_hpEmbed_3x2_384.jpg\")
ABC News
PHOTO: White House chef and Army vet Andre Rush shares his grilled salmon recipe.
Ingredients
2 1/2 pounds salmon fillets/steaks
2 oz lemon juice/zest
1 bulb fresh garlic
2 tablespoons pepper
1 teaspoon Kosher salt
1 1/2 cup soy sauce
1 cup brown sugar
1 cup water
1/2 cup vegetable oil
1 tablespoon sesame oil
Directions
Season salmon fillets/Steak with lemon pepper, garlic powder, and salt.
In a small bowl, whisk together soy sauce, brown sugar, water, and vegetable oil and sesame oil until sugar is dissolved. Place the salmon in a large container or bag with mixture, seal, and make sure you turn to coat. Refrigerate for a minimum of 1 hour.
Preheat grill for medium heat.
Lightly oil grill. Place salmon on the preheated grill, and discard marinade. Cook salmon for 6 to 8 minutes each side depending on thickness, or until flakes.
Chef Rush’s Fillet Steak with Chimichurri
![\"PHOTO:](\"http://a.abcnews.com/images/Lifestyle/house-chef-2-abc-er-180704_hpEmbed_3x2_384.jpg\")
ABC News
PHOTO: White House chef and Army vet Andre Rush shares his steak recipe to make this summer.
Ingredients
1/3 beef Fillet Tenderloin (whole)
2 tablespoons Sea Salt
2 tablespoons fresh cracked Pepper
2 sprigs rosemary
1 tablespoon oil
Ingredients for the Chimichurri sauce
1 snd 1/4 cup flat-leaf parsley with steams
4 cloves garlic, chopped roughly
3 tablespoons oregano leaves,fresh
3 tablespoons red wine vinegar
1/2 teaspoon salt
6 tablespoons extra virgin olive oil
Directions
Rub oil over tenderloin, and sprinkle even amounts of salt and pepper.
Put Tenderloin on the grill at medium heat, and turn every 4-6 minutes till internal temperature is 135F /52C.
Remove tenderloin from grill and let rest 5-10 minutes before slicing.
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