Mexican Pork Tostadas - Manitoba Pork

Ingredients

• 1 Tbsp / 15 mL canola oil
• 1 pork shoulder blade roast, boneless, 2-2½ lb / 1-1.25 kg
• 1 medium yellow onion, thinly sliced
• 3 cloves garlic, minced
• 1 Tbsp / 15 mL balsamic vinegar
• 2 tsp / 10 mL dried oregano leaves
• 1 tsp / 5 mL ground cumin
• 1 tsp / 5 mL salt
• ½ tsp / 2 mL ground black pepper
• 10-12 tostada shells