Place ginger, cumin, coriander, chilli and fennel seeds in a bowl and mix together. Pat dry pork fillet and lightly coat in oil. Then rub the spice mix evenly over the fillet.
For the tequila sauce, place ketchup, ginger, garlic, tequila, lime juice, brown sugar and chilli powder in a saucepan. Simmer over a medium heat for 10-15 minutes until it thickens.
Trim a hot plate liner to your BBQ hot plate and preheat your BBQ to a med to high heat.
Sear off all sides of your pork fillet and cook for 7 minutes each side with the hood down.
Remove from heat and rest the meat for 5 minutes. Slice evenly in 2cm thickness and serve with tequila sauce.