Crusted Tenderloin with Chipotle Onions

Ingredients

• juniper berries
  1 tbsp
• coriander seed
  1 tbsp
• dried oregano
  1 tbsp
• black peppercorns
  5½ tsp
• kosher salt
  ½ tsp
• allspice
  5 whole
• cloves
  2 whole
• chopped pecans
  1½ tbsp
• garlic cloves chopped
  4 unit
• beef or buffalo tenderloin - (4 to 5 lbs) fat trimmed
  1 unit
• canned chipotle chile
  1 unit
• onion - (½ lb) thinly sliced
  1 unit
• salad oil
  1 tbsp
• beef broth
  2 cup
• salt to taste
  1 unit
• freshly-ground black pepper to taste
  1 unit