Feedback

Again, I'm not actually suggesting that you merge this in and remove all your code. This just makes it easier to leave feedback :smile: 

Please submit a help request for any questions that you have about my comments.

### Don't merge this pull request
This method should return one recipe rather than a collection of recipes. You can also leave out the redundant table name throughout this query since it's only dealing with one table:

```ruby
def get_recipe(recipe_id)
  db_connection do |conn|
    sql = 'SELECT name, instructions, description FROM recipes
           WHERE recipes.id = $1 LIMIT 1'

    conn.exec(sql, [recipe_id]).first
  end
end
```