Beef tri-tip, charred corn and creamed spinach

Name: Beef tri-tip, charred corn and creamed spinach
Prep time: 20 min
Cook time: 3 h 40 min
Total time: 3 h 40 min
Yield: 4 portions
Ingredients: 2 tsp smoked paprika; 1 tsp sweet paprika; 2 tsp sea salt; 2 tsp brown sugar; 1 tsp ground black pepper; ½ tsp chilli powder; ½ tsp garlic powder; ½ tsp onion powder; ¼ - ½ tsp ground cayenne pepper; 900 - 1100 gram beef tri-tip; vegetable oil; 4 sweet corn cobs; 170 g water; 510 g fresh baby spinach; 110 g brown onion; 2 garlic cloves; 30 g unsalted butter; 115 g cream cheese; 60 g pouring (whipping) cream; ½ tsp sea salt