Lomo Saltado Beef Stir Fry

Ingredients

• 1 lb of beef (top sirloin, tri tip, or NY strip)
• 1/4 tsp salt (optional)
• 1 red onion, sliced into small wedges 
• 2 roma tomatoes, sliced into wedges
• 1 bag of frozen french fries (esp sweet potato fries)
• 1 Tbsp canola oil (or vegetable oil)
• handful of cilantro, roughly chopped
• 1 lime, sliced into wedges for garnish 
• Lomo Saltado Beef Stir Fry Sauce:
• 1 small piece of ginger, grated or minced
• 2 cloves of garlic, minced
• 3 Tbsp soy sauce
• 2 Tbsp white wine vinegar
• 1 Tbsp oyster sauce (optional)
• 1 Tbsp Piquant Post Aji Amarillo spice