For the grits:
1. In a large, heavy-bottomed saucepan set over medium-high heat, mix chicken stock and heavy cream. Bring to a boil.
2. Add grits and stir until the grits are thick and difficult to stir. (Stir continuously as the grits cook so they do not stick to the bottom of the pot.)
3. Remove the pot from the heat and add cheese, salt and pepper.
4. Set aside while cooking the shrimp.
For the shrimp:
1. Heat oil in a large sauté pan over medium-high heat.
2. When oil is hot, add shrimp, Cajun spice and sausage. Toss.
3. Cook for one minute, then add garlic, shallots and tomato. Toss with shrimp and sausage.
4. Cook, letting the flavors marry, for about two minutes.
5. Add white wine to the pan and deglaze, scraping any brown bits from the bottom of the pan. Let the mixture simmer until the shrimp are just cooked through, about one minute or less.
6. Remove pan from heat and add butter. Stir to combine.
To plate:
1. Divide the grits among four large bowls.
2. Add five shrimp to each bowl, then top with sauce, tomato and sausage.
3. Garnish each bowl with fresh chives.