Spray the bundt pan with cooking spray. Preheat oven to 350°.
In a bowl large enough to hold finished batter, beat eggs, egg yolk and sugar until it it light and creamy. Beat in vanilla and ricotta. Beat in milk.
Combine flour, baking powder and salt. Mix evenly.
Add flour to wet ingredients and beat just until evenly mixed.
Toss chocolate chips in a teaspoon of flour to coat. (This will prevent them sinking to the bottom of the cake pan.) Stir chips into batter. Batter will be thick.
Pour batter into prepared bundt pan. Bake 35-40 minutes. Test for doneness after 35 minutes. A toothpick inserted should come out clean.
Unmould cake after 20 minutes or so. Allow cake to cool completely and pour/drizzle ganache evenly over the top of the cake.
To make ganache, chop chocolate in to fine pieces. Heat cream in a large microwaveable measuring cup. Do not allow cream to boil. Add chocolate to the cream and allow it to sit 5 minutes. Stir well until chocolate is mixed. Allow ganache to cool to the consistency you want to pour. This may take 1 - ½ hours at room temperature. If it cools completely it will become firm (spreadable). You want to pour/drizzle it when it is thick but still pourable.